Jm. Joubert et al., THERMODYNAMIC AND STRUCTURAL COMPARISON BETWEEN 2 POTENTIAL METAL-HYDRIDE BATTERY MATERIALS LANI3.55MN0.4AL0.3CO0.75 AND CENI3.55MN0.4AL0.3CO0.75, Journal of alloys and compounds, 277, 1998, pp. 118-122
The thermodynamic and structural properties of CeNi3.55Mn0.4Al0.3Co0.7
5, LaNi3.55Mn0.4Al0.3Co0.75 and their hydrides (deuterides) are compar
ed. The isothermal curves have been measured. The lattice parameters a
nd the occupancies of the various interstitial sites by deuterium have
been determined by powder neutron diffraction. Differences between th
e two compounds as regards the hydrogen absorption are interpreted in
terms of the different atomic radii of lanthanum and cerium. The evolu
tion of the valence of cerium as a function of hydrogen content is dis
cussed. (C) 1998 Elsevier Science S.A.